Machine for hardening steel.



G. WUELSBR. MACHINE FOR HARDENING STEEL.

APPLIUATION FILED OUT. 9. 1913.

Patented Nov. 24

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GOTTLIEB WUELSER; OF COLUMBUS, OHIO.

MACHINE .FOR IHARDENING STEEL.

Specification of letters Patent. Application filed October 9, 1913.

To nit ill/m it 771 (13, Gunmen.

lie it known that l, Geri-Linn l/VuuLsnn, a, citizen of the United f'itates of America, residing at Columbus, in the county of Franklin and State of Ohio, have invented certain new and useful. ,lrnproveincnts in Illtttillilles for liar-d aling Steel, of which the following is a specilication, reference being hail therein to the accompanying (flrawing.

This invention relates to a machine for hardei'iing steel and other metals, and the primary object of my invention is to provide positive and reliable means, in n. munner hereinafter forth, for subjecting a piece of heated metal to a hardening solution or liquid under pressure, whereby a piece of inetal will he evenly and uniformly tempered Another object of this invention to provide a machine for hardening metal where in liquid under pressure is utilized for hardening a piece of metal, and by eontrolling, the pressure of the liquid pieces of metal can he i'nirdened alike. A further object of this invention is to eliminate the (cracking and ui'ievcn hardening of a piece of l'netal. by simultaneously subjecting all exppsed surfaces thereof to the action of a liqu d under pressure.

A still further object of this invention is to provide a i'i'iaehine for hardening steel and other metals that; consists of compare-- tively few parts that are inexpensive to manufact easy to assemble, durable, and highly e" tytor the purposes for which are intendeih the inventionresides in the novel construcoinhinntion and arrangement mt parts,

renee wiil now he had to the drawing, ciur--- i are l. is a verticai sectional view of the :nuic 'iiinr. a horizontal sectional view cl? :1 portion of the some taken on the liue ll l of Fig. 1, Fig". 3 is a i. on the line Ui---III of l ig. l, t is a front elevation of the teiu iuariog cylinder, and Fig. 53 is a vertical sectional view of the same.

A machine in ur-cm'da nee with this inventien mprises a cylindrical tank it adapted to contain water, oil or a. hardening; soluwhich placed within the tank thrrmgh the medium of a tunnel titBillliClilOlTl h. the ahove and other objects in view v the cylinder, 1. hereiiia'tter s ieiieitically described and Patented or. 24, .1914. Serial No. 794,817.

2 carried by the top of said 11k, said funnel connection having a shut off valve 3. One side of the tank 1 has a gage glass t and a drain cock 5, said height of the contents of the tank and said drain cock permitting of the tank being drained and. flushed.

(lonnected to the top of the tank is an air supply pipe (3 having a conventional form of shut-off valve 7. The top of the tank is provided with an exhaust valve 8 and with a pressure gage 9, said gage determining the amount of air pressure upon the liquid within the tank and saidexhaust valve permitting of the pressure being reduced when excessive of what is desired.

The top of the tank has a goose-neck 10 provided with :1 down-pipe 11 that extends in )roxiinity to the bottom of the tank 1. 'i.he outer end of the goose neck has a shut-oil valve 12 of the ordinary and well known type and said valve is connected to a tempering cylinder 13, secured,

as at 14 to, the side of the tank 1. The bottom of the cylinder is open and the front side thereof is cut away, as at 15 whereby the pieces of metal to be hardened can be easily placed in the cylinder.

Diametrieally opposed inner walls of the cylinder 13 have vertical guide ribs 16 that extend into notches 17 in a movable head 18 arranged within the cylinder. The head 18 is slightly less in diameter than the cylinder and said head is perforated or aper'tured, as at 19. The bottom side of the head 18 is pivotallv connected, as at 20 to toggles 21 and said toggles are supported by a transverse shaft 22 journaled in the lower end of said shaft having; one end thereof provided with a crank or. lever 23 whereby the toggles can be moved to raise and lower the head 18'.

Connected to the inner wall of the cylinder 13, adjacent to the lower end therethat can be shiftwithin the bank upwardly 11 into the top of the cylinder 13,

l, the hardening through the pine Where ii: pressure, the surfaces oi 'izhe piece of metal upon the head 18 The space between the heed l8 and the wells of the cylinder and the apertures in said hes allow a sufiicient quantity of hardening liquid. to pass through the cylinder to cool the same. 1

My machine has been especially designed -for hardening tool steel to u desired dc roe of hardness WilillOllll cracking end to reduce shrinkage toe mi imuin of tools, such as expensive dies, punches, forming tools, cutters, gages, templcts, etc. With improved 'i'ui'naces it is possible to heart uny'purticulerly shaped piece of iool steel slowly and uniformly, but to cool or dip it; uniformly, insuring an even and'uniformherdness a over thereby preventing an uneven strain, which is the cause 01 cracking, it is necessary to place the piece oi steel in an inclosedcasing or cylinder, and for this reuson l have devised my machine, which embodies a cylinder in which a piece of steel can be subjecie to a uniform and continuous under regulated pressure, consequently the liquid will be forced in to the crevices an against all the surfaces of the steel unti completely cooled end hardened. Drinking or Well Water 'cen be used to give absolute hardness, but the'chcnces are large for a piece of steel being cracked. Soft or rain water or oils will preventcracking out do not give the hardness such as desired :Eor all ins; liqiiid liquid is forced encounters under metal cutting edges, on account of being almost non edhesive ic e heated piece oi": metal or tool steel. But by forcing the same in the manner. disclosed by my machine, a piece of steel can be uniformly hardened without the herdening liquid veporining end with more uniform ILES'LlliS than obtained by pinl hardened metal in e trough or receptec e. I

From the foregoing it will be oldserved that with my improved machine one motel can be hardened exactly like enocher piece, this being possible on account of mein; mining the some amount of flovv of the hardening solution, losses are evoide and e higher gm roduct obtained.

While in are illusirered The preferred embodiments of the invention, it is to the structure-l clemencs are susceptible to such variations en modifications as fell within the scope oi the appended claim,

A machine ifor hardening metal comprising :1 tank adapted .to contain e hardening liquid, connections for'supplying and don trolling" an air ressure Within said 'ienli upon the contents thereof, a cylinder carried by said will: end having connections therewith to receive the hardening liquid em said tank, a manually ope ate heed movable in scid cylinder and sdepled to support a piece of metal whereby the some is so jecterl to the hardening liquid under ressure, means Within said cylinder for limiting the movement of said head, and means below said cylinder for collecting the liquid discharged therefrom.

in testimony whereof I efix my signature in the presence of two witnesses.

GOTTLlEB WJELSER.

pressure on consequent y e of i l itnesses ous'rns lilnrnn, dossier: Bones-mm.

piece or dip lili 

